PURPOSE: To obtain the subject compound useful as a chemical raw material in high conversion ratio of catechols, selectivity and purity by subjecting catechols to addition reaction with an olefin and carrying out disproportionation reaction under prescribed temperature conditions.
CONSTITUTION: (B) A catechols (preferably catechol) is subjected to addition reaction with (C) an olefin (preferably isobutylene) in the presence of (A) an acid catalyst (preferably sulfuric acid) and then subjected to disproportionation reaction at a temperature lower than (preferably 60-100°C) the addition reaction (preferably 110-150°C) to provide the objective compound. Furthermore, after the addition reaction, a disproportionation reaction in the first step is carried out at 130-170°C and then a disproportionation reaction in the second step is carried out at 60-100°C and the component C is preferably used in an amount of 0.55-0.8mol based on 1mol of the component B and the component A is preferably used in an amount of 0.05-5mol based on 100 pts.wt. of the component B.
HIRAI MIKI
TAKAHASHI KATSUJI
